Patents by Inventor J. Boyd Alleman

J. Boyd Alleman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for purifying perchloroethylene containing dichlorobutadiene
    Patent number: 5731482
    Abstract: Perchloroethylene containing contaminating amounts of dichlorobutadiene is treated with bromine, e.g., elemental bromine, in the presence of a free-radical initiator, thereby to produce perchloroethylene substantially-free of dichlorobutadiene and without significant loss of perchloroethylene. A bromine scavenger, e.g., trichloroethylene, can be added to the treated perchloroethylene to react with excess bromine that may be present in the perchloroethylene.
    Type: Grant
    Filed: January 3, 1997
    Date of Patent: March 24, 1998
    Assignee: PPG Industries, Inc.
    Inventors: J. Douglas Mansell, Robert K. Pertuit, J. Boyd Alleman, W. Eugene Wimer